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Finding the Third Proportional to 298,881 and 644,988

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Solution

The third proportional to 298,881 and 644,988 is: 1,391,890.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,881 : 644,988 = 644,988 : x
  2. Step 2: Convert to fraction form
    298,881/644,988 = 644,988/x
  3. Step 3: Cross multiply
    298,881x = 644,988 × 644,988
  4. Step 4: Simplify right side
    298,881x = 416,009,520,144
  5. Step 5: Solve for x
    x = 416,009,520,144/298,881
  6. Step 6: Final answer
    x = 1,391,890.15

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.